collections {
   base_scale: 1.0;
   group { name: "main";
      parts {
         part { name: "rect";
            type: RECT;
            description { state: "default" 0.0;
               rel1.relative: 0.0 0.0;
               rel2.relative: 1.0 1.0;
               color: 0 136 170 255;
            }
         }
      }
   }
}